plastic piece at top of window

A quick learner from canada says:
April 4, 2022
need those caps for top of window
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Casey from SWISCO responded:
April 5, 2022

Hello,

I would recommend starting by comparing the style and dimensions of the 18-018 top sash guide to yours. Thanks for posting! 
5/8" Sash Guide, Howmet
5/8" Sash Guide, Howmet
18-018
$1.87
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